基于磁力电耦合效应的电力线路磁场能量采集研究  

Research on magnetic field energyharvesting of power lines based on magneto-electric coupling effect

作　　者：辛明勇 徐长宝 祝健杨 李成林 鲁彩江 XIN Mingyong;XU Changbao;ZHU Jianyang;LI Chenglin;LU Caijiang(Electric Power Research Institute of Guizhou Power Grid Co.,Ltd.,Guiyang 550005,China;School of Mechanical Engineering,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]贵州电网有限责任公司电力科学研究院,贵阳550005 [2]西南交通大学机械工程学院,成都610031

出　　处：《自动化与仪器仪表》2024年第11期43-47,共5页Automation & Instrumentation

基　　金：贵州电网有限责任公司科技项目(GZKJXM20220045);国家自然科学基金项目(52175519,61801402);四川省杰出青年科技人才项目(2020JDJQ0038);贵州省科技创新人才技术团队项目(黔科合平台人才[2020]5015)。

摘　　要：架空电力线路通常采用钢芯铝绞线,为了保障架空电力线路监测传感器电源供给,设计了一种基于磁力电多场耦合效应的电力钢绞线磁场能量采集装置。通过有限元仿真,分析了普通长直导线与钢芯铝绞线的磁场分布差异,根据钢芯铝绞线磁场特点,设计了采用U型永磁铁阵列的悬臂梁式磁场能量采集装置及电源管理电路。实验测试结果表明,在工频50 Hz电流激励下,装置最优负载为150 kΩ;当导线电流为20 A、50 A和100 A时,装置输出功率分别为1.66 mW、5.15 mW和10.14 mW;装置输出能量通过能量管理电路调节,实现了对电池的有效充电。提出的磁场能量采集装置在小电流和大电流条件下均能正常工作,实现了对钢芯铝绞线的磁场能量的有效采集,有利于推进磁场能量采集装置在自供能传感器领域的应用。In order to ensure the power supply of monitoring sensors for overhead power lines,a magnetic field energy collection device of power steel strands based on the coupling effect of magneto-electric multi-field is designed in this paper.By finite element simulation,the difference of magnetic field distribution between ordinary long straight wire and steel-cored Al strand is analyzed.According to the magnetic field characteristics of steel-cored Al strand,a cantilever beam magnetic field energy collection device and power management circuit using U-shaped permanent magnet array are designed.The experimental results show that the optimal load of the device is 150 kΩ under the power frequency 50 Hz current excitation.When the wire current is 20 A,50 A and 100 A,the output power of the device is 1.66 mW,5.15 mW and 10.14 mW,respectively.The output energy of the device is regulated by the energy management circuit to realize the effective charging of the battery.The magnetic field energy collection device proposed in this paper can work normally under both low and high current conditions,and can effectively collect the magnetic field energy of steel core aluminum stranded wire,which is conducive to promoting the application of magnetic field energy collection device in the field of self-supply energy sensor.

关 键 词：磁场能量采集 压电效应 钢芯铝绞线 磁力电多场耦合 电源管理 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]